I don't think it is always an issue of being open-minded. I can readily understand why a person is perplexed. He or she does not understand. Many things fly in the face of societal norms and customs and religious beliefs. There are many things I do not understand when it comes to human sexuality or sexual identity. Heck, I don't understand myself. It becomes how someone espouses his or her beliefs. Is it in a civil manner? Or does the person denigrate the someone? I've heard it from Congresspersons. Some have spoken in very bigoted terms. It can come from the person sitting across from you at work. Or at a family gathering. I've basically told others to know it off! If they do not want to continue our relationship, then the heck with them.
I am not a marriage counselor. However, it really bothers me sometimes to read posts of total outright hostility displayed by a wife towards her husband. Some of the threads border on spousal mental abuse. It's one thing for a spouse to not understand her husband's desire to wear women's clothing and not want to see or participate in it, and, it's another for her to constantly throw insults and negativity at him. Sometimes people need to keep their mouths shut.
